Finding the Third Proportional to 3,645,840 and 7,977,792

Step by Step Solution

1. Step 1: Write the proportion equation
   3,645,840 : 7,977,792 = 7,977,792 : x
2. Step 2: Convert to fraction form
   3,645,840/7,977,792 = 7,977,792/x
3. Step 3: Cross multiply
   3,645,840x = 7,977,792 × 7,977,792
4. Step 4: Simplify right side
   3,645,840x = 63,645,165,195,264
5. Step 5: Solve for x
   x = 63,645,165,195,264/3,645,840
6. Step 6: Final answer
   x = 17,456,927.68